Earlier in the week, students at Anne Arundel Community College in Maryland took their first semester exam for an accounting class. Reb Betty, the professor of the class, allowed his students to bring in a "3x5" cheat sheet to help them with their exam.

"When I walked into the classroom Tuesday, I saw this student in the front of the room with this large poster board, and initially thought that it was simply his approach to studying for the exam," Beatty told TODAY. "I figured he was getting his last few minutes in before the exam commenced."

Elijah Bowen, a student in the class, noticed that the professor only said "3x5" but did not specify the measurements. So he decided to bring in a 3-by-5-foot poster board.

The professor shortly posted the photo of the student's cheat sheet on Instagram and Facebook.

"First test day of the semester and as always, I allow a 3x5 notecard. Today, a student shows up with this. Sure enough, it is 3x5... feet. As precise as I am, apparently I never specified inches and therefore yes, it was allowed. Well played and lesson learned for me," he wrote.

Beatty told TODAY that he allowed the student to use the cheat sheet during the exam.

"Appreciating the fact that (a) he had the intelligence to realize this shortcoming and (b) the audacity to actually put this together and bring it in, there was no reason to not allow him to use it," he said.